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Finding the Fourth Proportional to 5,423.70, 8,136.22 and 1,912.88

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Solution

The fourth proportional to 5,423.70, 8,136.22 and 1,912.88 is: 2,869.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.70 : 8,136.22 = 1,912.88 : x
  2. Step 2: Convert to fraction form
    5,423.70/8,136.22 = 1,912.88/x
  3. Step 3: Cross multiply
    5,423.70x = 8,136.22 × 1,912.88
  4. Step 4: Simplify right side
    5,423.70x = 15,563,612.51
  5. Step 5: Solve for x
    x = 15,563,612.51/5,423.70
  6. Step 6: Final answer
    x = 2,869.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.